* org-agenda.el (org-agenda-show-inherited-tags): Allow to be
set to 'always or to a list of agenda types.
(org-agenda-finalize): Rework conditions under which inherited
tags should be made available even when not displayed.
(org-search-view, org-agenda-get-todos)
(org-agenda-get-timestamps, org-agenda-get-sexps)
(org-agenda-get-progress, org-agenda-get-scheduled)
(org-agenda-get-blocks): Use new possible values of
`org-agenda-show-inherited-tags'.

* org.texi (Handling links): Update the mention to the
obsolete variable `org-link-to-org-use-id' with a mention to
the newer variable `org-id-link-to-org-use-id'. Mention the
need to load the org-id library.

* org.el (org-refresh-properties): Rename from
`org-refresh-effort-properties' and use two new parameters.
(org-agenda-prepare-buffers): Use `org-refresh-properties'.
Also refresh the 'org-appt-warntime text property.

* org-clock.el (org-clock-in): Use the renamed defun.

* org-icalendar.el (org-icalendar-print-entries): Refresh the
'org-appt-warntime property.
(org-icalendar-print-entries): Do not use `org-entry-get' to
get the "APPT_WARNTIME" property value.

With a default value of t for `org-agenda-dim-blocked-tasks',
any non-nil value for `org-enforce-todo-checkbox-dependencies' or
`org-enforce-todo-dependencies' (or both) will slow down the
agenda generation too much, which might surprise the user.

* org.el (org-goto-auto-isearch): Enhance docstring.
(org-goto-map): Make a defun, so that the customized value of
org-goto-auto-isearch is correctly initialized.
(org-goto): Initialize the keymap with `org-goto-map'.
(org-get-location): Use *Org Help* as a temporary buffer.
Tell whether auto-isearch is on or off.

* org.el (org-blocker-hook): Update the docstring to mention
that functions in this hook should not modify the buffer.
(org-trigger-hook): Small docstring fix.
(org-entry-blocked-p): Use `with-buffer-modified-unmodified'
so that the function never modifies the buffer.

Thanks to Sven Bretfeld for reporting this.

When building the agenda, checking for blocked items should not
set the buffers as modified, otherwise exiting the agenda will ask
for confirmation each time it kills a buffer.

* org-agenda.el (org-agenda-open-link): Allow to open an
internal link by using the new `org-offer-links-in-entry'
function.

* org.el (org-offer-links-in-entry): Do not open the link
directly through `org-open-link-from-string', only offer to
select a link and return a cons with the link (as a string)
and the end of entry.
(org-open-at-point): Use `org-offer-links-in-entry' correctly.

* lisp/org-compat.el (org-condition-case-unless-debug): Do not use
defalias for special forms, the Emacs 22 byte-compiler does not
recognize them correctly when compiling macros. Use a macro instead
and rely on macro expansion. That however makes the decision at
compile time, which should be acceptable in this case since it only
affects debugging.